field



S D. FIELD. ELECTROMAGNETIC MECHANISM.

(No Model.)

i i 68.55. I

Tm WM 1 Q 7) is not pivoted, out is supported by a yielding strap orspring f" v In either of these improved'forms the lever I) is free tomove longitudinally, whereby the sliding; of the levers on each other isavoided and the consequent friction is eliminated. The friction is thenonly that of the curved surface of lever'atrolling upon lever b. Thedevice is thus rendered more sensitive, and becomes capable ofresponding to feeble forces.

I claim as my invention 1. In a system of compensating levers, a pair oflevers arranged substantially parallel and having abutting faces, one ofsaid faces being curved, and a support for one of the levers adapted topermit longitudinal movement thereof, as described.

2. The combination with a pair of compensating levers arrangedsubstantially parallel and having abutting faces, one of said faces andits armature, of a pair of compensating levers, wheteby a constantlyincreasing resistance is opposed to the attraction of the magnet uponits armature, one of said levers being mounted upon a supportpermittinglongitudinal movement of said lever, substan- "tially asdescribed.

In test mony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 24th day of July, 1895.

'STEPl-IEN D. FIELD.

Titnesses;

FRANK R, MCBERTY, ERANK 0. LOQKJWOOD.

